[OpenAFS] Re: odd problem with RW site after a botched replica
Timothy Balcer
timothy@telmate.com
Wed, 31 Oct 2012 13:47:50 -0700
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>
> > I have been considering running VMs to spread out fs operations on a
> > machine with many cores. On a 12 core machine, for example, I would
> > make something like 4 fileservers each with 3 cores, and the
> > underlying OS would be doing nothing except servicing those VMs. Do
> > you think this would allow for better performance?
>
> That depends on what performance you are talking about, but for other
> reasons I would guess 'yes'. OpenAFS fileservers have been found to
> actually perform worse if you add too many cores (I think it was over 2
> or 3; or at least you get very little benefit after that point, and
> things get worse futher on). Hopefully that will get better, but for
> now, yes, some people have addressed this by running fileservers in VMs,
> zones, chroots, etc and allocating specific cores to fileserver
> processes.
>
> Excellent, and it's in line with what I thought was the case. Thanks
muchly.
> --
> Andrew Deason
> adeason@sinenomine.net
>
> _______________________________________________
> OpenAFS-info mailing list
> OpenAFS-info@openafs.org
> https://lists.openafs.org/mailman/listinfo/openafs-info
>
--
Timothy Balcer / IT Services
Telmate / San Francisco, CA
Direct / (415) 300-4313
Customer Service / (800) 205-5510
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<div class=3D"gmail_quote"><blockquote class=3D"gmail_quote" style=3D"margi=
n:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class=3D"im"=
>
> I have been considering running VMs to spread out fs operations on a<b=
r>
> machine with many cores. On a 12 core machine, for example, I would<br=
>
> make something like 4 fileservers each with 3 cores, and the<br>
> underlying OS would be doing nothing except servicing those VMs. Do<br=
>
> you think this would allow for better performance?<br>
<br>
</div>That depends on what performance you are talking about, but for other=
<br>
reasons I would guess 'yes'. OpenAFS fileservers have been found to=
<br>
actually perform worse if you add too many cores (I think it was over 2<br>
or 3; or at least you get very little benefit after that point, and<br>
things get worse futher on). Hopefully that will get better, but for<br>
now, yes, some people have addressed this by running fileservers in VMs,<br=
>
zones, chroots, etc and allocating specific cores to fileserver<br>
processes.<br>
<div class=3D"HOEnZb"><div class=3D"h5"><br></div></div></blockquote><div>E=
xcellent, and it's in line with what I thought was the case. Thanks muc=
hly.<br>=A0<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 =
0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div class=3D"HOEnZb"><div class=3D"h5">
--<br>
Andrew Deason<br>
<a href=3D"mailto:adeason@sinenomine.net">adeason@sinenomine.net</a><br>
<br>
_______________________________________________<br>
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<a href=3D"mailto:OpenAFS-info@openafs.org">OpenAFS-info@openafs.org</a><br=
>
<a href=3D"https://lists.openafs.org/mailman/listinfo/openafs-info" target=
=3D"_blank">https://lists.openafs.org/mailman/listinfo/openafs-info</a><br>
</div></div></blockquote></div><br><br clear=3D"all"><br>-- <br><span style=
=3D"border-collapse:collapse;color:rgb(102,102,102);font-family:verdana,san=
s-serif;font-size:x-small">Timothy Balcer / IT Services<br>Telmate / San Fr=
ancisco, CA<br>
Direct / </span><span style=3D"border-collapse:collapse;font-family:verdana=
,sans-serif;font-size:x-small"><font color=3D"#1155cc">(415) 300-4313</font=
><br><font color=3D"#666666">Customer Service /=A0</font><a value=3D"+18002=
055510" style=3D"color:rgb(17,85,204)">(800) 205-5510</a></span><br>
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